The Classic Heavyweight Duffel is made from a durable combination of nylon and polyester. The Heavyweight Duffel not only has a spacious interior compartment but also has additional front and side pockets for extra storage. The shoulder strap is fully adjustable, as well as padded and reinforced, which makes carrying your gear a comfortable and easy task. The Classic Heavyweight Duffel is perfect for carrying anything from books and gym clothes to sports gear, it is a comfortable way to carry everything you need.